d^2-14d+49=10

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Solution for d^2-14d+49=10 equation:


Simplifying
d2 + -14d + 49 = 10

Reorder the terms:
49 + -14d + d2 = 10

Solving
49 + -14d + d2 = 10

Solving for variable 'd'.

Reorder the terms:
49 + -10 + -14d + d2 = 10 + -10

Combine like terms: 49 + -10 = 39
39 + -14d + d2 = 10 + -10

Combine like terms: 10 + -10 = 0
39 + -14d + d2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-39' to each side of the equation.
39 + -14d + -39 + d2 = 0 + -39

Reorder the terms:
39 + -39 + -14d + d2 = 0 + -39

Combine like terms: 39 + -39 = 0
0 + -14d + d2 = 0 + -39
-14d + d2 = 0 + -39

Combine like terms: 0 + -39 = -39
-14d + d2 = -39

The d term is -14d.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14d + 49 + d2 = -39 + 49

Reorder the terms:
49 + -14d + d2 = -39 + 49

Combine like terms: -39 + 49 = 10
49 + -14d + d2 = 10

Factor a perfect square on the left side:
(d + -7)(d + -7) = 10

Calculate the square root of the right side: 3.16227766

Break this problem into two subproblems by setting 
(d + -7) equal to 3.16227766 and -3.16227766.

Subproblem 1

d + -7 = 3.16227766 Simplifying d + -7 = 3.16227766 Reorder the terms: -7 + d = 3.16227766 Solving -7 + d = 3.16227766 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + d = 3.16227766 + 7 Combine like terms: -7 + 7 = 0 0 + d = 3.16227766 + 7 d = 3.16227766 + 7 Combine like terms: 3.16227766 + 7 = 10.16227766 d = 10.16227766 Simplifying d = 10.16227766

Subproblem 2

d + -7 = -3.16227766 Simplifying d + -7 = -3.16227766 Reorder the terms: -7 + d = -3.16227766 Solving -7 + d = -3.16227766 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + d = -3.16227766 + 7 Combine like terms: -7 + 7 = 0 0 + d = -3.16227766 + 7 d = -3.16227766 + 7 Combine like terms: -3.16227766 + 7 = 3.83772234 d = 3.83772234 Simplifying d = 3.83772234

Solution

The solution to the problem is based on the solutions from the subproblems. d = {10.16227766, 3.83772234}

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